CN116378862A

CN116378862A - Gas injection device

Info

Publication number: CN116378862A
Application number: CN202310276164.6A
Authority: CN
Inventors: 顾小磊; 周庭波; 吴松; 臧娈; 吴潇潇; 胡凯耀; 李振强
Original assignee: FAW Jiefang Automotive Co Ltd
Current assignee: FAW Jiefang Automotive Co Ltd
Priority date: 2023-03-21
Filing date: 2023-03-21
Publication date: 2023-07-04
Anticipated expiration: 2043-03-21
Also published as: CN116378862B

Abstract

The present application relates to a gas injection device. The gas injection device comprises an injection shell, an armature assembly, an elastic assembly, a needle valve assembly and a double electromagnet assembly, wherein the injection shell is provided with an air inlet channel and an air outlet end; the armature assembly comprises a first armature and a second armature; the needle valve assembly is arranged at the air outlet end and comprises a needle valve; the double electromagnet assembly comprises a first electromagnet and a second electromagnet which are isolated from each other, and when the first electromagnet is electrified, the first armature is driven to move against the first elastic force so as to drive the sealing of the first sealing part and the air inlet channel to be released; when the second electromagnet is electrified, the second armature is driven to drive the needle valve to move against the second elastic force, and the sealing between the second sealing part and the air outlet end is driven to be released. The gas spraying device has the advantages of rapid switch response and accurate gas flow control, and can meet the full-river-basin coverage.

Description

Gas injection device

Technical Field

The present application relates to the field of gas injection devices, and in particular, to a gas injection device.

Background

With the development of vehicle technology, vehicle energy sources extend from traditional fossil fuels to clean fuels such as low carbon or zero carbon gas. The gas injector is also called as a gas fuel injector, is one of key components in a gas fuel system, can realize timing and quantitative staged air inlet and air injection functions, and has very important influence on the power performance of the whole gas fuel system.

The gas injector generally has a solenoid valve assembly and a movable motion assembly, wherein the solenoid valve assembly and the armature form a solenoid valve to generate electromagnetic force after the solenoid valve assembly is energized, and the electromagnetic force overcomes the spring force to drive the motion assembly to axially move between an open position and a closed position so as to realize the opening and closing of the electromagnetic injection valve. For gas fuel, a gas injector is required to realize accurate injection and control, so that quantitative gas can be injected within a preset duration, and the duration of single injection is required to be accurately controlled, the gas injector in the traditional technology has slow switching response, and the gas quantity is not accurately controlled, so that the use requirement of full-river-basin coverage cannot be met.

Disclosure of Invention

Based on this, provide a gas injection apparatus, can alleviate the switch response of gas injector slow, the tolerance control is accurate inadequately, can not satisfy the technical problem of the operation requirement of full river basin cover.

Embodiments of the present application provide a gas injection apparatus, including:

the air inlet channel and the air outlet end are arranged on the jet shell;

an armature assembly mounted within the injection housing, the armature assembly comprising a first armature and a second armature, the first armature being provided with a first sealing member;

the elastic assembly comprises a first armature spring, the first armature spring is connected with the first armature, and the first armature spring provides a first elastic force for the first armature, so that the first armature drives the first sealing component to seal the air inlet channel;

the needle valve assembly is arranged at the air outlet end and comprises a needle valve body, a needle valve and a needle valve spring, the needle valve body is provided with an air outlet, the needle valve is provided with a second sealing component, the needle valve spring is connected with the needle valve, the needle valve is connected with the second armature, and the needle valve spring provides a second elastic force for the needle valve, so that the needle valve drives the second sealing component to seal the air outlet;

the double electromagnet assembly is arranged in the injection shell and comprises a first electromagnet and a second electromagnet which are isolated from each other, a first armature stroke H1 is arranged between the first armature and the first electromagnet by the aid of first elastic force, and a second armature initial air gap H2 is arranged between the second armature and the second electromagnet by the aid of second elastic force;

when the first electromagnet is electrified, the first armature is driven to move against the first elastic force, and the sealing between the first sealing component and the air inlet channel is driven to be released;

when the second electromagnet is electrified, the second armature is driven to drive the needle valve to move against the second elastic force, and the second sealing part is driven to release the sealing of the air outlet end.

In one embodiment, the dual electromagnet assembly is disposed between the first armature and the second armature, and the dual electromagnet assembly further includes a limiting valve seat, the limiting valve seat isolates the first electromagnet from the second electromagnet, and the first electromagnet is located at a side of the second electromagnet, which is close to the first armature.

In one embodiment, an electromagnet mounting stage hole is formed in the injection shell, and the double electromagnet assembly is flexibly mounted in the electromagnet mounting stage hole;

the two ends of the electromagnet installation step hole are respectively provided with a first armature lift gasket and an elastic element, one end of the first armature lift gasket is abutted to one end face of the electromagnet installation step hole, the other end of the first armature lift gasket is abutted to the first electromagnet, one end of the elastic element is abutted to the other end face of the electromagnet installation step hole, and the other end of the elastic element is abutted to the second electromagnet.

In one embodiment, the limiting valve seat is provided with a valve seat first step hole for installing the first armature spring, one end of the first armature spring is fixedly connected with the limiting valve seat, and the other end of the first armature spring extends to the outside of the valve seat first step hole and is fixedly connected with the first armature.

In one embodiment, the armature assembly further comprises an armature pin fixedly connected to the second armature, the armature pin abutting the needle valve.

In one embodiment, the elastic assembly further comprises a second armature spring, the second armature spring is connected with the second armature, and the second armature spring provides a third elastic force for the second armature, so that the second armature drives the armature rod to keep abutting with the needle valve.

In one embodiment, the needle valve assembly further comprises a needle valve body provided with a concave hole in the needle valve body;

the outer wall of the needle valve is fixedly provided with a needle valve spring seat, one end of the needle valve spring is fixedly connected with the needle valve spring seat, and the other end of the needle valve spring is abutted to the needle valve body;

when the second sealing part seals the air outlet, a needle valve lift H3 is arranged between the needle valve spring seat and the end face of the concave hole in the needle valve body;

when the second electromagnet is electrified, the needle valve can drive the needle valve spring seat to be in butt joint with the end face of the concave hole in the needle valve body.

In one embodiment, the needle valve assembly further comprises a compression block and a needle lift gasket, the outer wall of the needle valve is provided with a step, the needle lift gasket is installed between the step end face and the needle spring seat, and the compression block compresses and fastens the needle spring seat and the needle lift gasket on the step end face.

In one embodiment, a needle valve installation stage hole is arranged in the injection shell, and the needle valve assembly is installed in the needle valve installation stage hole;

one end of the needle valve installation stage hole is provided with a second armature air gap gasket, one end of the second armature air gap gasket is abutted with one end face of the needle valve installation stage hole, and the other end of the second armature air gap gasket is abutted with the needle valve seat.

In one embodiment, the first sealing member includes a gasket secured to the first armature, the gasket for sealing the intake passage; and/or

The second sealing part comprises a sealing head fixed on the needle valve end head, the sealing head extends to the outside of the air outlet, and the sealing head is used for sealing the air outlet from the outside of the air outlet.

According to the gas injection device of the embodiment of the application, the first sealing component of the first armature seals the air inlet channel to form a first-stage seal; the second sealing member of the needle valve seals the air outlet end to form a second stage seal. The movement of the first armature can be controlled by controlling the energizing amount of the first electromagnet, and the opening or closing of the air inlet channel is controlled at the first-stage sealing position; the movement of the second armature can be controlled by controlling the energizing amount of the second electromagnet so as to drive the needle valve to move, thereby controlling the opening or closing of the air outlet end at the second-stage sealing position. The gas injection device realizes the independent opening and closing movement of the first armature and the second armature by independently controlling the two electromagnetic valve components respectively, so that the gas injection device is correspondingly and rapidly opened and closed, the second electromagnet can be electrified in advance, synchronously or in a lagging way according to the actual gas quantity requirement of the gas injection device and the requirements of each working condition, and the gas flow is matched and accurately controlled; under the condition that the air inlet pressure is unchanged, the movement of the armature assembly can be controlled only by adjusting the electrifying conditions of the first electromagnet and the second electromagnet, the size and air quantity control of the air injection device is realized, and the global flow requirement of the system is met.

Drawings

Fig. 1 is a schematic structural diagram of a gas spraying device according to an embodiment of the present application.

Fig. 2 is a schematic partial structural view of a dual electromagnet assembly and armature assembly embodied in a gas injection device according to an embodiment of the present application.

Fig. 3 is a schematic structural diagram of H1, H2, H3, and H4 embodied in a gas injection apparatus according to an embodiment of the present application.

Fig. 4 is a schematic diagram of an upper housing structure of a jet housing in a gas jet device according to an embodiment of the present application.

Fig. 5 is a schematic structural view of a lower housing of the injection housing in the gas injection device according to an embodiment of the present application.

Fig. 6 is a schematic view of a structure of a gas spraying device according to an embodiment of the present disclosure, wherein the upper casing and the lower casing form a spraying casing.

Fig. 7 is an enlarged partial schematic view at a in fig. 2.

Fig. 8 is a partially enlarged schematic view at B in fig. 2.

Fig. 9 is a schematic structural diagram of a dual electromagnet assembly in a gas injection apparatus according to an embodiment of the present disclosure.

Fig. 10 is a schematic view of a structure of a needle valve assembly embodied in a gas injection apparatus according to an embodiment of the present application.

Reference numerals:

1. a dual electromagnet assembly; 11. a first electromagnet; 111. a coil sealing plate; 12. a second electromagnet; 13. a limit valve seat; 131. the valve seat penetrates through the middle hole; 132. a valve seat first stepped bore; 133. a valve seat second stepped bore;

2. an armature assembly; 21. a second armature; 211. balance through holes; 212. a second boss plane; 213. an open slot; 22. armature pin; 221. a limit boss; 23. a first armature; 231. a sealing gasket; 232. an armature transverse hole; 233. an armature axial middle hole; 234. a first boss plane;

3. a needle valve assembly; 31. a needle valve; 311. a step; 312. a sealing head; 32. a needle valve body; 321. an air outlet; 322. concave holes in the needle valve body; 33. a compaction block; 34. needle valve spring seat; 341. needle valve through hole; 35. needle lift shims; 36. a needle valve spring;

4. tightening the cap;

5. an upper housing; 51. an air intake passage; 52. the upper shell is arranged on the seat block; 53. an extension channel; 54. an electromagnet mounting stage hole; 55. an armature second stage mounting hole; 56. a lower housing mounting stage hole;

6. a lower housing; 61. an air outlet end; 62. a connection hole; 63. a ring groove is arranged on the concave end surface; 64. an inner and outer biconvex table endless belt; 65. a needle valve installation stage hole; 66. an armature first stage mounting hole; 67. a communication hole;

7. an elastic component; 71. a second armature spring; 72. an elastic element; 73. a first armature spring; 74. a first armature lift pad; 75. a second armature air gap shim;

8. a joint; 81. and an air inlet cavity.

Detailed Description

In order that the above-recited objects, features and advantages of the present application will become better understood, a more particular description of the invention briefly described below will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is, however, susceptible of embodiment in many other forms than those described herein and similar modifications can be made by those skilled in the art without departing from the spirit of the application, and therefore the application is not to be limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that, if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., these terms refer to the orientation or positional relationship based on the drawings, which are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In this application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.

Referring to fig. 1 and 2, fig. 1 shows a schematic structure of a gas injection apparatus according to an embodiment of the present application. Fig. 2 shows a schematic partial structure of a gas injection apparatus embodying a double electromagnet assembly 1 and an armature assembly 2 according to an embodiment of the present application. The embodiment of the application provides a gas injection device, including the injection casing, armature subassembly 2, elastic component 7, needle valve subassembly 3 and double electromagnet assembly 1, be provided with inlet channel 51 and end 61 of giving vent to anger on the injection casing, armature subassembly 2 installs in the injection casing, armature subassembly 2 includes first armature 23 and second armature 21, first armature 23 is provided with first sealing member, elastic component 7 includes first armature spring 73, first armature spring 73 connects first armature 23, first armature spring 73 provides first elastic force for first armature 23, make first armature 23 drive first sealing member with inlet channel 51 sealed, needle valve subassembly 3 sets up in end 61 of giving vent to anger, needle valve subassembly 3 includes needle valve body 32, needle valve 31 and needle valve spring 36, needle valve body 32 is provided with gas outlet 321, needle valve 31 is provided with second sealing member, needle valve spring 36 connects

needle valve

31, 31 is connected with second armature 21, spring 36 provides the second elastic force for needle valve 31, make needle valve 31 drive second sealing member with gas outlet 321 sealed.

Referring to fig. 3, fig. 3 shows a schematic structural diagram of H1, H2, H3, and H4 embodied in a gas injection apparatus according to an embodiment of the present application. The double electromagnet assembly 1 is arranged in the injection shell, the double electromagnet assembly 1 comprises a first electromagnet 11 and a second electromagnet 12 which are isolated from each other, a first armature 23 stroke H1 is arranged between a first armature 23 and the first electromagnet 11 by a first elastic force, and a second armature 21 initial air gap H2 is arranged between a second armature 21 and the second electromagnet 12 by a second elastic force.

When the first electromagnet 11 is electrified, the first armature 23 is driven to move against the first elastic force to drive the sealing of the first sealing component and the air inlet channel 51 to be released, and when the second electromagnet 12 is electrified, the second armature 21 is driven to drive the needle valve 31 to move against the third elastic force to drive the sealing of the second sealing component and the air outlet end 61 to be released.

In some embodiments, the first armature 23 and the second armature 21 are coated or hardened with a magnetic material.

According to the gas injection apparatus of the embodiment of the present application, the first sealing member of the first armature 23 seals the intake passage 51 to form a first-stage seal, and the second sealing member of the needle valve 31 seals the outlet end 61 to form a second-stage seal. By controlling the energizing amount of the first electromagnet 11, the movement of the first armature 23 can be controlled, the opening or closing of the air inlet passage 51 can be controlled at the first stage seal, and by controlling the energizing amount of the second electromagnet 12, the movement of the second armature 21 can be controlled to drive the needle valve 31 to move, thereby controlling the opening or closing of the air outlet end 61 at the second stage seal. The gas injection device realizes independent opening and closing movements of the first armature 23 and the second armature 21 by independently controlling the two electromagnetic valve components respectively, so that the gas injection device is correspondingly and rapidly opened and closed, the second electromagnet 12 can be electrified in advance, synchronously or in a delayed manner according to the actual gas volume requirement of the gas injection device and the requirements of all working conditions, the gas flow matching and accurate control are realized, and the movement of the armature component 2 can be controlled only by adjusting the electrifying conditions of the first electromagnet 11 and the second electromagnet 12 under the condition that the inlet pressure is unchanged, the gas volume control of the gas injection device is realized, and the system global flow requirement is met. The gas injection device can independently control gas inlet and gas injection, can be applied to a working scene with higher gas medium pressure, has larger flow characteristics, synchronously realizes quick injection and large and small gas quantity control, and adopts two-stage sealing to improve the overall sealing performance of the gas injection device.

Referring to fig. 1, in some embodiments, the spray housing is formed by combining an upper housing 5 and a lower housing 6, and a communicating cavity is provided inside the upper housing 5 and the lower housing 6. The air inlet channel 51 is arranged on the upper shell 5, a joint 8 is arranged at one end of the air inlet channel 51, the joint 8 is provided with an air inlet cavity 81, and the air inlet cavity 81 is communicated with the air inlet channel 51. As shown in fig. 2, the outer wall of the lower case 6 is provided with a connection hole 62, and the connection hole 62 extends to the inside of the lower case 6. The inner wall of the upper housing 5 is provided with an extension passage 53 communicating with the other end of the intake passage 51, the extension passage 53 communicating with the connection hole 62. That is, the gas sequentially enters the air inlet channel 51 of the upper housing 5 from the air inlet cavity 81 of the joint 8, and finally enters the injection housing through the extension channel 53 and the connecting hole 62, thereby realizing the air inlet operation of the gas injection device.

Referring to fig. 4, fig. 4 is a schematic view showing the structure of an upper housing 5 of a jet housing in a gas jet apparatus according to an embodiment of the present application. Specifically, in some embodiments, the upper housing 5 has an armature second mounting stage hole 55, an electromagnet mounting stage hole 54, and a lower housing mounting stage hole 56 connected in this order. Wherein the armature second stage mounting hole is used for mounting the second armature 21, the electromagnet mounting stage hole 54 is used for mounting the double electromagnet assembly 1, and the lower housing mounting stage hole 56 is used for mounting the lower housing 6. The apertures of the armature second mounting stage hole 55, the electromagnet mounting stage hole 54, and the lower housing mounting stage hole 56 are gradually increased, so that the inner wall of the upper housing 5 forms a stepped hole shape.

Referring to fig. 5, fig. 5 is a schematic view showing the structure of a lower housing 6 of a jet housing in a gas jet apparatus according to an embodiment of the present application. Specifically, in some embodiments, the first armature mounting stage hole 66, the communication hole 67, and the needle valve mounting stage hole 65 are sequentially provided in the lower case 6. Wherein, armature first installation stage hole 66 is used for installing first armature 23, and communication hole 67 communicates armature first installation stage hole 66 and needle valve installation stage hole 65, and needle valve installation stage hole 65 is used for installing needle valve assembly 3. The inner wall of the lower housing 6 is provided with a connection hole 62. The connecting hole 62 includes a transverse hole and a vertical hole which are communicated with each other. One end of the connection hole 62 is connected to the extension passage 53 of the upper case 5, and the other end is communicated with the inside of the lower case 6. That is, one end of the transverse hole is communicated with the extension passage 53, the other end of the transverse hole is connected with one end of the vertical hole, and the other end of the vertical hole is communicated with the inside of the lower shell 6. The air intake passage 51 of the upper case 5 is communicated with the inside of the lower case 6 by the provision of the connection hole 62. The first sealing member of the first armature 23 seals the vertical hole of the connecting hole 62, so that the sealing of the first sealing member to the intake passage 51 can be achieved. When the sealing between the first sealing member and the vertical hole of the connecting hole 62 is released, the air intake opening operation of the air injection device is realized, and air can smoothly enter the injection housing through the gap of the first armature 23 stroke H1.

Referring to fig. 5 and 6, fig. 6 is a schematic view showing a structure of a gas injection apparatus according to an embodiment of the present application, in which an injection case is composed of an upper case 5 and a lower case 6. The upper housing 5 and the lower housing 6 are combined to form a spray housing. Specifically, the lower casing 6 is mounted in the lower casing mounting stage hole 56 of the upper casing 5, the outer wall of the lower casing 6 abuts against the inner wall of the lower casing mounting stage hole 56, and the end surface of the lower casing 6 close to the air inlet passage 51 and the electromagnet mounting stage hole 54 form a mounting space of the double electromagnet assembly 1. The needle valve assembly 3 is installed in the needle valve installation stage hole 65, the air injection work of the air injection device is completed by the cooperation of the needle valve 31 and the air outlet 321 in the needle valve assembly 3, and one end of the needle valve installation stage hole 65 of the lower shell 6, which is far away from the air inlet channel 51 of the upper shell 5, is the air outlet end 61 of the air injection device.

Referring to fig. 2, in one embodiment, the dual electromagnet assembly 1 is disposed between the first armature 23 and the second armature 21, and the dual electromagnet assembly 1 further includes a limiting valve seat 13, where the limiting valve seat 13 isolates the first electromagnet 11 from the second electromagnet 12, and the first electromagnet 11 is located on a side of the second electromagnet 12 near the first armature 23.

Specifically, the first electromagnet 11 and the second electromagnet 12 are respectively arranged at two ends of the limiting valve seat 13, two double electromagnet assemblies 1 which are oppositely arranged back to back are arranged in the injection shell, and the movement of the first armature 23 and the second armature 21 is controlled by controlling whether the first electromagnet 11 and the second electromagnet 12 are electrified or not and the electrified quantity. The first electromagnet 11 and the second electromagnet 12 can be mounted and fixed on the limit valve seat 13 in an interference, welding or riveting mode. The limiting valve seat 13 is made of a weak magnetic or non-magnetic conductive material, so that magnetic field interference between the first electromagnet 11 and the second electromagnet 12 is prevented, the upper end face and the lower end face of the limiting valve seat 13 are respectively used for being impacted with the second armature 21 and the first armature 23, and have a limiting effect on the movement of the second armature 21 and the first armature 23, so that the end face of the limiting valve seat 13 needs to have impact-resistant hardness or strength. The limiting valve seat 13 is provided with a valve seat through-hole 131 for guiding and flowing gas of the armature assembly 2.

Specifically, the first electromagnet 11 and the second electromagnet 12 are pressed between the upper casing 5 and the lower casing 6 by the elastic element 72, and are driven by a double circuit, and the air inlet and the air outlet of the gas injection device are respectively controlled by combining a control strategy. After the gas injection device is connected with a current control signal, the first electromagnet 11 and the second electromagnet 12 receive current sequentially or synchronously, the first electromagnet 11 controlling the air inlet channel 51 drives the first armature 23 at the air inlet channel 51 to move along the axial direction of the injection shell, the sealing of the first sealing component and the air inlet channel 51 is driven to be released, the air inlet channel 51 is opened, and external gas enters the injection shell. Correspondingly, according to the actual working condition requirement of the gas injection device, the other current signal can be provided for the second electromagnet 12 in advance, synchronously or in a lagging way, the second electromagnet 12 and the second armature 21 are controlled to generate electromagnetic force under the action of current, the second armature 21 drives the needle valve 31 to axially move along the injection shell, the sealing between the second sealing part of the needle valve 31 and the gas outlet 321 is released, and the gas outlet 321 of the gas injection device is opened, so that the gas injection device can inject gas. After the solenoid valve of the gas injection device is powered off sequentially or synchronously, the first armature 23, the second armature 21 and the needle valve 31 are respectively seated back to the original positions under the action of the first armature spring 73 and the needle valve spring 36.

Referring to fig. 7 and 8, fig. 7 shows a partially enlarged schematic view at a in fig. 2. Fig. 8 shows a partially enlarged schematic view at B in fig. 2. In one embodiment, an electromagnet mounting step hole 54 is provided in the injection casing, the dual electromagnet assembly 1 is flexibly mounted in the electromagnet mounting step hole 54, two ends of the electromagnet mounting step hole 54 are respectively provided with a first armature lift gasket 74 and an elastic element 72, one end of the first armature lift gasket 74 is abutted with one end face of the electromagnet mounting step hole 54, the other end of the first armature lift gasket 74 is abutted with the first electromagnet 11, one end of the elastic element 72 is abutted with the other end face of the electromagnet mounting step hole 54, and the other end of the elastic element 72 is abutted with the second electromagnet 12.

Specifically, in some embodiments, the first armature lift spacer 74 is annular, with its circumferential outer wall abutting the inner wall of the electromagnet mounting step bore 54, one end face of the first armature lift spacer 74 abutting the end face of the lower housing 6, and the other end face abutting the end face of the first electromagnet 11. In some embodiments, the resilient member 72 may be modified from a wave spring, disc spring, leaf spring, or the like to be a non-metallic member with some resilient preload. The elastic element 72 is also annular, the circumferential outer wall of the elastic element 72 abuts against the inner wall of the electromagnet mounting stage hole 54, one end surface of the elastic element 72 abuts against the end surface of the second electromagnet 12 remote from the first electromagnet 11, and the other end surface abuts against the end surface of the electromagnet mounting stage hole 54. The double electromagnet assembly 1 is flexibly pressed and mounted in the electromagnet mounting stage hole 54 by the elastic element 72.

Referring to fig. 7, in one embodiment, the first sealing member includes a gasket 231 fixed to the first armature 23, the gasket 231 sealing the intake passage 51. Specifically, the gasket 231 is embedded in the first armature 23, and the inner and outer double boss annular bands 64 are provided on the concave end surface of the lower housing 6 near the connection hole 62, and when the first sealing portion seals the intake passage 51, the gasket 231 is pressed against the inner and outer double boss annular bands 64, so as to seal the intake passage 51. In order to ensure good sealing of the gas injection device, the gasket 231 is a non-metallic member. One end of the first armature spring 73 is placed on the limiting surface of the first armature 23, and under the action of the first elastic force, the sealing gasket 231 is ensured to be in complete sealing contact with the end surface of the lower shell 6. The upper end attracting surface of the first armature 23 is provided with a first boss plane 234 for impacting and contacting with the lower end surface of the limiting valve seat 13, and meanwhile, when the first armature 23 is fully attracted, a residual air gap exists between the first armature 23 and the first electromagnet 11. It is appreciated that in some embodiments, the first boss plane 234 may be required to increase overall stiffness or strength for reliability.

Specifically, the first armature 23 is provided with an armature transverse hole 232 and an armature axial middle hole 233 communicating with the armature transverse hole 232 for gas communication.

Referring to fig. 1 and 9, fig. 9 is a schematic structural view of a dual electromagnet assembly 1 in a gas injection apparatus according to an embodiment of the present application. In one embodiment, the limiting valve seat 13 is provided with a valve seat first step hole 132 for installing the first armature spring 73, one end of the first armature spring 73 is fixedly connected with the limiting valve seat 13, and the other end of the first armature spring extends to the outside of the valve seat first step hole 132 and is fixedly connected with the first armature 23. Specifically, the coil is sealed by using a coil sealing plate 111 on the double electromagnet assembly 1, and the coil sealing plate 111 is generally made of weak magnetism or diamagnetism and is matched with a nonmetallic part for sealing gas, so that the gas is prevented from entering the inside of a coil groove for placing the coil.

In one embodiment, the armature assembly 2 further includes an armature stem 22, the armature stem 22 being fixedly connected to the second armature 21, the armature stem 22 abutting the needle valve 31.

In some embodiments, the outer wall of the armature rod 22 is provided with a limit boss 221, and the limit boss 221 is used to limit when the second armature 21 pushes the armature rod 22 to move. The limit valve seat 13 is provided with a valve seat second stepped hole 133 for the limit boss 221 to move. The first armature 23 is not limited on the armature rod 22, the first armature 23 axially slides on the outer circle of the upper end and the lower end of the armature rod 22, and the second armature 21 and the armature rod 22 can be in clearance sliding fit or interference fit. The armature rod 22 is provided with an open flow path for the flow of gas. The first armature 23 and the second armature 21 move independently and do not interfere with each other, that is, the embodiment of the application does not need to consider that idle stroke or clearance for preventing the first armature 23, the second armature 21 and the armature rod 22 from interfering with the axial installation dimension of the needle valve assembly 3 is arranged, so that the assembly reliability is improved.

Specifically, a valve seat penetrating center hole 131 through which the armature pin 22 passes is provided in the limit valve seat 13, and the valve seat penetrating center hole 131 communicates with the valve seat first stepped hole 132 and the valve seat second stepped hole 133. The armature rod 22 is capable of depressing the needle valve 31 in response to actuation of the second armature 21 by the second electromagnet 12, causing movement of the needle valve 31. That is, the first electromagnet 11 drives the first armature 23 to move upwards to control the air injection device to inject air, the second electromagnet 12 drives the second armature 21 to move downwards to drive the needle valve 31 to move downwards axially, so that the air outlet end 61 is opened to control the air injection device to inject air.

In one embodiment, referring to fig. 2 and 8, the elastic assembly 7 further includes a second armature spring 71, where the second armature spring 71 is connected to the second armature 21, and the second armature spring 71 provides a third elastic force to the second armature 21, so that the second armature 21 drives the armature rod 22 to keep abutting with the needle valve 31.

Specifically, the inner wall of the upper housing 5 is provided with an upper housing seating block 52 extending toward the second armature 21, and one end of the second armature spring 71 is sleeved outside the upper housing seating block 52 and fixedly connected with the inner wall of the upper housing 5. The other end of the second armature spring 71 is sleeved on the second armature 21 and is fixedly connected with the outer wall of the second armature 21. The second armature spring 71 presses the second armature 21 against the end face of the limit boss 221 of the armature rod 22. A residual gap H4 not larger than 0.2mm is arranged between the second armature 21 and the upper shell seating block 52, and is used for ensuring the seating stability of the second armature 21, keeping the working stability of the second armature 21 in each second electromagnet 12 actuation, preventing the second armature spring 71 from being failed in a parallel loop, and improving the working reliability.

In some embodiments, at least two balancing through holes 211 are circumferentially uniformly distributed on the upper and lower end surfaces of the second armature 21, so as to balance the upper and lower gas forces, and the third elastic force of the second armature spring 71 acts on the second armature 21 to ensure that the second armature 21 is in full contact with the armature rod 22, and synchronously ensure that the armature rod 22 is in full contact with the needle valve 31. The armature engaging surface is provided with a second boss plane 212 with at least two open grooves 213, and the second boss plane 212 is used for being in impact contact with the upper end surface of the limiting valve seat 13, and simultaneously, when the second armature 21 is fully engaged, a residual air gap and a gas flow passage exist between the second armature 21 and the second electromagnet 12. It is appreciated that in some embodiments, the second land plane 212 may be required to provide increased overall stiffness or strength for increased reliability.

Referring to fig. 10, in one embodiment, the needle valve assembly 3 further includes a needle valve body 32, the needle valve body 32 is provided with a concave hole 322 in the needle valve body, a needle valve spring seat 34 is fixed on the outer wall of the needle valve 31, one end of a needle valve spring 36 is fixedly connected with the needle valve spring seat 34, the other end of the needle valve spring 36 is abutted on the needle valve body 32, when the second sealing member seals the air outlet 321, a needle valve 31 lift H3 is provided between the needle valve spring seat 34 and the end face of the concave hole 322 in the needle valve body, and when the second electromagnet 12 is electrified, the needle valve 31 can drive the needle valve spring seat 34 to abut against the end face of the concave hole 322 in the needle valve body.

Specifically, the tightening cap 4 compressively mounts the needle valve assembly 3 to the lower end of the lower housing 6. The needle valve 31 is arranged in the needle valve body 32, a needle valve spring seat 34 is arranged at the upper end of the needle valve 31, a needle valve spring 36 is arranged between the needle valve spring seat 34 and the needle valve 31, the needle valve 31 is pressed on the needle valve body 32 by the acting force of the needle valve spring 36, and the contact sealing surface of the needle valve 31 and the needle valve body 32 is positioned at the lower end of the needle valve assembly 3. The needle valve spring seat 34 includes at least two needle valve through holes 341 arranged axisymmetrically along the longitudinal axis of the gas injection device. The needle valve assembly 3 is provided with a needle valve 31 gasket for adjusting the lift of the needle valve 31, and the lift H3 of the needle valve 31 is the distance between the lower end surface of the needle valve spring seat 34 and the end surface of the concave hole 322 in the needle valve body. The needle valve spring seat 34 is fixedly installed on the needle valve 31 by the compression block 33, and the installation and connection mode of the compression block 33 and the needle valve 31 can be interference, screw threads, riveting or the like.

In one embodiment, the needle valve assembly 3 further comprises a compressing block 33 and a needle lift gasket 35, the outer wall of the needle valve 31 is provided with a step 311, the needle lift gasket 35 is installed between the end face of the step 311 and the needle spring seat 34, and the compressing block 33 compresses and fixes the needle spring seat 34 and the needle lift gasket 35 on the end face of the step 311.

Referring to fig. 5 and 10, in one embodiment, a needle valve installation stage hole 65 is provided in the injection housing, the needle valve assembly 3 is installed in the needle valve installation stage hole 65, one end of the needle valve installation stage hole 65 is provided with a second armature air gap gasket 75, one end of the second armature air gap gasket 75 is abutted with one end face of the needle valve installation stage hole 65, and the other end is abutted with the needle valve 31 seat.

Referring to fig. 10, fig. 10 is a schematic view showing the structure of a needle valve assembly 3 embodied in a gas injection apparatus according to an embodiment of the present application. In one embodiment, the second sealing member includes a sealing head 312 fixed to the end of the needle valve 31, the sealing head 312 extending outside the air outlet 321, the sealing head 312 for sealing the air outlet 321 from outside the air outlet 321.

In some embodiments, the first armature 23 and the second armature 21 may have various attraction and impact forms with respective electromagnets, that is, the upper section or the lower section of the limit valve seat 13 is combined with the electromagnet core, that is, the limit valve seat 13 is changed from the cross-shaped structure provided in the current embodiment into a straight-shaped structure or a T-shaped structure, and the local surface of the attraction surface is strengthened, so that the armatures directly impact the iron core, or the inner hole of the attraction surface of the iron core may be embedded with other high-strength materials to replace local surface strengthening measures.

In some embodiments, the second armature 21 is integral with the armature stem 22 as a unitary moving member.

In some embodiments, the circumferentially arranged gas flow passages of the upper and

lower housings

5, 6 may take a variety of forms, and may be straight holes, tapered holes, etc.

In some embodiments, the lower housing 6, the upper housing 5, the joint 8, the needle valve assembly 3, and the tightening cap 4 are connected by interference, threads, or rivets, etc.

In the gas injection device in the application, under the non-electrified state, the first elastic force of the first armature spring 73 acts on the first armature 23 to ensure that the sealing gasket 231 is in complete sealing contact with the end face of the lower shell 6, so that gas is isolated in the air passages of the lower shell 6, the upper shell 5 and the joint 8, the first-stage sealing of the gas injection device body is realized, and meanwhile, the second armature 21 is attached to the armature rod 22 and the needle valve 31 under the acting force of the second armature spring 71; the second elastic force of the needle valve spring 36 acts on the needle valve 31 and the needle valve body 32, so that the sealing head 312 at the lower end of the needle valve 31 with the outward opening structure is tightly attached to the sealing surface of the lower end face of the needle valve body 32, the air outlet 321 is sealed, and the second-stage sealing of the gas injection device is realized. The second spring force of the needle valve spring 36 is greater than the third spring force of the second armature spring 71, the magnitude of which is determined by the preferred gas injection device performance.

In this assembled state, referring to fig. 7, the distance between the boss of the first boss plane 234 at the upper end of the first armature 23 and the lower end face of the limit valve seat 13 is H1, namely, the stroke of the first armature 23;

referring to fig. 8, the distance between the second boss plane 212 of the second armature 21 and the upper end surface of the limit valve seat 13 is H2, which is the initial air gap of the second armature 21; the distance between the upper end surface of the second armature 21 and the seating block of the upper shell 5 is H4, namely the remaining gap of the second armature 21;

referring to fig. 10, the distance between the lower end surface of the needle valve spring seat 34 and the stepped surface of the concave hole 322 in the needle valve body is H3, namely the lift of the needle valve 31;

the parameters of H1, H2, H3 and H4 are adjusted by the gaskets, and the parameters are respectively: h1 is primarily adjusted by the thickness of the first armature lift shim 74, H2 and H4 are primarily adjusted by the thickness of the second armature air gap shim 75, and H3 is primarily adjusted by the thickness of the needle lift shim 3533.

After the gas injection device is electrified, the double electromagnet and the double armature generate attraction force, the first armature 23 drives to move upwards, the first-stage seal is opened, gas enters the gas injection device from a gap between the first armature 23 and the seal gasket 231 and the lower shell 6, then flows into the needle valve assembly 3 from the armature transverse hole 232 and the armature axial middle hole 233 at the upper end of the first armature 23, enters a gap flow passage between the needle valve 31 and the needle valve body 32 through the circumferentially arranged flow passage of the needle valve spring 36, finally reaches the air outlet end 61, and is sprayed out from the air outlet end 61 of the gas injection device.

In the energized state of the gas injection device, according to the driving signal of the control unit, electromagnetic force is generated between the first electromagnet 11 and the first armature 23, after the electromagnetic force and the air pressure acting on the sealing gasket 231 overcome the first elastic force of the first armature spring 73, the first armature 23 moves upwards to the lower end surface of the limiting valve body, the first-stage sealing is opened, the gas enters the gas injection device, and the moving distance of the armature at the moment is a gap H1; correspondingly, the second electromagnet 12 can generate enough electromagnetic force between the second electromagnet 12 and the second armature 21 in advance, synchronously or after according to the driving signal of the control unit and the requirements of each working condition, and after overcoming the second spring force of the needle valve spring 36, the electromagnetic force and the third elastic force of the second armature spring 71 push the armature rod 22 and the needle valve 31 to move downwards, the lower end surface of the needle valve spring seat 34 moves to be in contact with the upper end surface of the needle valve 31, and the needle valve 31 is completely opened for injection or waits for injection.

After the gas injection device is powered off, under the action of the first armature spring 73 and the needle valve spring 36, the first armature 23, the second armature 21 and the needle valve 31 move upwards, and the first armature 23 assembly 2 and the needle valve 31 are respectively seated to finish injection.

According to the scheme, under the condition that the air inlet pressure is unchanged, the two solenoid valve assemblies are controlled respectively, so that independent opening and closing movement of the two armatures is realized, and according to the actual air quantity requirement of the air injection device, the air flow matching and accurate control can be realized through controlling the driving signal. Under the condition that the air inlet pressure is unchanged, the movement of the armature assembly 2 is controlled only by adjusting the driving control signal, so that the air quantity control is realized, and the global flow requirement of the system is met.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples merely represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims

1. A gas injection apparatus, comprising:

the air inlet channel and the air outlet end are arranged on the jet shell;

2. The gas injection apparatus of claim 1, wherein the dual electromagnet assembly is disposed between the first armature and the second armature, the dual electromagnet assembly further comprising a check valve seat separating the first electromagnet from the second electromagnet, the first electromagnet being located on a side of the second electromagnet adjacent the first armature.

3. The gas injection apparatus of claim 2 wherein said injection housing has an electromagnet mounting stage aperture therein, said dual electromagnet assembly being flexibly mounted within said electromagnet mounting stage aperture;

4. The gas injection device of claim 2, wherein the limit valve seat is provided with a valve seat first stepped hole for mounting the first armature spring, one end of the first armature spring is fixedly connected with the limit valve seat, and the other end of the first armature spring extends to the outside of the valve seat first stepped hole and is fixedly connected with the first armature.

5. The gas injection device of claim 1, wherein the armature assembly further comprises an armature stem fixedly connected to the second armature, the armature stem abutting the needle valve.

6. The gas injection apparatus of claim 5, wherein the resilient assembly further comprises a second armature spring coupled to the second armature, the second armature spring providing a third resilient force to the second armature such that the second armature moves the armature stem into abutment with the needle valve.

7. The gas injection apparatus of claim 1, wherein the needle valve assembly further comprises a needle valve body provided with a needle valve body recess;

8. The gas injection device of claim 7, wherein the needle valve assembly further comprises a compression block and a needle lift shim, the needle valve outer wall is provided with a stepped step, the needle lift shim is mounted between the stepped step end face and the needle spring seat, and the compression block compresses the needle spring seat and the needle lift shim against the stepped step end face.

9. The gas injection apparatus of claim 7 wherein a needle valve mounting stage bore is provided in said injection housing, said needle valve assembly being mounted in said needle valve mounting stage bore;

10. The gas injection apparatus of claim 1, wherein the first sealing member comprises a gasket secured to the first armature, the gasket for sealing the intake passage; and/or